Using a large sauce pan, first crush and saute the garlic, in 1/2 cup of water. After the garlic starts to turn clear, add the chopped onion(s). Now add the remaining items, bringing to a medium heat and let cook. Stir frequently initially until it starts to cook down, then reduce heat to low. If the sauce is soupy, leave off the lid, if its too thick, add water (a little goes a long way). Let simmer for 45 minutes, longer if you need to thicken it up. The spagetti will cook in about 15 minutes once put in boiling water. Once the sauce is thick, start the spagetti noodles.